Absolutely, if the blade manufacturer is willing to give advise, use it.
BTW, I've never heard of anyone etching a composite surface with chemicals to prepare it for painting. Cleaning and Sanding are normal - but the optimal degree of roughness or smoothness depends on the paint being applied. For that matter, if we are talking about an ultralight composite structure, which means the resin layers, including surface layers, are very thin, even sanding away some of resin could be bad.
I bet you could use gel nail polish and then cure with a UV light. This probably wouldn't negatively damage the mount at all.
I don't use nail polish, but it is my understanding it includes one or more solvents:
https://www.thoughtco.com/nail-polish-chemistry-603996It is somewhat possible the solvent(s) might damage or partially dissolve the resin.
Composites like Carbon Fiber + Resin rely on the properties of both materials to create a strong, stiff material. (E.g., most types of carbon fiber are quite flexible. Carbon fiber provides only tensile strength. It must be combined with a material, like plastic resin, that resists compression, to give the desired properties.) If you dissolve away the surface resin, that WOULD adversely affect the mount.
In contrast, marine paints are specifically designed to bond to the hardened resins used in similar composites, without damage.
Another source of info might be
Sweet Composites, arguably the best respected supplier serving the ultra-light marine community (racing kayaks, canoes, shells, etc.). Another source might be one of the companies serving the ultralight aviation community, though they might be less concerned with appearance than the marine community.
If you really want something which I am pretty certain won't damage anything, cover the mount with a colored wax. It won't last long, and can't begin to compare to a gelcoat in beauty, but it is unlikely to do harm.
Now, a personal opinion: Covering Revolution blades, among the most expensive luxury figure skating blades available, with mere paint, is a little like covering a high end custom designer skating dress with a cheap rain poncho. If you buy Revolution blades, you may as well show them off, in their purest, most original form, uncoated and uncolored. What do the rest of you think?